The tau Gem system contains 1 exoplanet. It is located 367.05 light years away from the solar system.
| Mass | 2.3 solar masses |
| Radius | 26.8 solar radiae |
| Temperature | 4388 kelvin |
| Stellar Metallicity | 0.14 decimal exponent |
| Age | 1.22 billion years |
At more than 50 Earth masses, tau Gem b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 6547.000 Earth masses |
| Density | 20.300 grams per cubic centimeter |
| Radius | 12.100 Earth radiae |
| Semi-major Axis | 1.17 AU |
| Eccentricity | 0.031 |
| Orbital Period | 305.500 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | Lick Observatory |
| Discovery Telescope | 0.6 m Coude Auxiliary Telescope |
| Discovery Instrument | Hamilton Echelle Spectrograph |
| Discovery Date | 2013-07 |
| Reference | Mitchell et al. 2013 |